How to move words from side to side in C deprogramming language

Question

I do not know how to comeplet this to let it move words from side to side I was following my teacher but I missed some lines:

#include <stdio.h>

#include <string.h>

char line [80]

int main (){

strcpy(line."ball");

printf("%s\n",line);

printf("%72 s\n",line);

printf("% *s\n",36);

}